what IV stage are you using? just using DSD instead of i2s isnt going to somehow circumvent analogue stages that dont have offset. its more likely to be a glitch/transient caused by the overlapping of different samplerates. particularly given the ESS isnt playing native DSD, its converted to 6 bit blocks internally in the dac, not acting as a 1bit analogue filter.

qusp, do you know of a 1bit analogue filter solution available today.. i.e. tru to the DSD concept?